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Where is the IAC idle control valve on a 1994 chevy 1500

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  • Chevrolet Master
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Attached to the side of the throttle body It will be black and round and have a 4 pin connector

Posted on Apr 12, 2015

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Posted on Jan 02, 2017

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SOURCE: how i clean Idle Air Control (IAC) Valve

well, first of all remove from vehicle. most iac have 2 torx screws to remove it. use an old toothbrush or similar to clean it. do not put body of iac in any liquid or it will ruin it. just clean valve on end of iac. also do not push on iac valve, because it will mess up idle of vehicle. just clean the valve on end to remove carbon build up and dirt. you can use brake cleaner or throttle body cleaner for this. it is also a good idea to clean around throttle plate to remove carbon on throttle body itself. but do iac first and put back on throttle body. have a good day!

Posted on Jan 21, 2011

emissionwiz
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SOURCE: fast idle after warm up .already changed IAC valve

fast idle is many times caused by a engine intake vacuum leak, use a can of carb spray and spray the top of the engine for leaks, if u hit one u will hear the eng change idle speed, also look for split or leaking vacuum hoses.

Posted on May 20, 2009

  • 34 Answers

SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working

before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.

Posted on Jun 20, 2009

  • 14 Answers

SOURCE: IAC control valve. Locato\ion 2002 ford escape

If it's not idling and has problems starting, it's probably the IAC motor. It's located on the throttle body. Follow the airfilter box all the way to the engine, where the rubber flex hose attaches. The throttle body should be the first aluminum part you come to. Attached to the side you'll find small little aluminum part with a small wire harness attached. Unplug it, take the IAC motor off and clean inside with carb cleaner. This should fix the problem with the idle.

Posted on Sep 11, 2009

ZJLimited
  • 17970 Answers

SOURCE: 02 mitsubishi eclipse p507 code.

P0507 - Idle Air Control (IAC) System RPM Higher Than Expected

This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

Potential Symptoms: Most likely you'll notice the idle speed is higher than normal. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

Causes: A P0507 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* Leaking air intake after the throttle body
* EGR valve leaking vacuum
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Failed EVAP system
* Failed IAC (idle air controller) or faulty IAC circuit

Possible Solutions: This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.

Hope helps.

Posted on Aug 17, 2010

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1 Answer

Why does my 2004 buick rendezvous idle at 3000 rpm and put in gear it drops to 1500 rpm and shifts hard while driving due to high engine speed?


Stuck throttle plate . gummed up with varnish or a problem with IAC valve . IAC - idle air control valve ! Videos on youtube , how they work how to clean . Idle Air Control Valve Could have unmetered air entering the engine pass the MAF sensor , a bad MAP sensor ! I would check the throttle plate first , if dirty clean it . Then check IAC valve if not the throttle plate . GM Idle Air Control IAC Function Diagnostics and Repair

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How do I adjust the idle on my 1994 Dodge 1500 5.2 I replaced the IAC and seems like it is still idling low can I adjust the IAC to make it idle higher?


The IAC is controlled by the computer, it is not adjustable. There might be an adjustment at the throttle body (where your throttle cable connects to). Clean or replace your PCV valve, and check for vacuum leaks.

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2003chevy pu dies at stop lights, low idle whats wrong?


yea id definately try cleaning ur throttle body 1st. My 03 1500hd had the exact same bad idle after my battery went bad it would die at lights unless i kept foot on gas i cleaned throttle body runs perfect now took 30min cost 8$ for cleaner at autozone and theres how to videos on you tube

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2003 chevy 4.8L truck wont start unless you give it gas any ideas


it sounds like the device used to control the idle speed is the problem. This is the IAC, idle air control valve. check the electrical plug going to the valve for security. The valve can be removed and cleaned with spray carb cleaner. Clean the throttle bore and plate as well. check for broken or disconnected vacuum lines. Lastly a stuck or clogged PVC or EGR valve may cause similar problems.

You may need to replace the IAC.

go to autozone.com web site. they will have a tutorial on how to test and replace IAC.

Nov 17, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Truck shuts off when going at slow speeds


Check the IAC VALVE,idle air control. It might be dirty and sticking,clean throttle body with intake cleaner make sure to spray in all openings in throttle body. If that doesn't work replace IAC VALVE. If you replace IAC VALVE make sure you clean opening good when IAC VALVE is out.

Feb 13, 2010 | 1994 Chevrolet C1500

1 Answer

3.2 liter yamaha engine manual IAC valve How do I replace the IAC valve on this engine? Steps? I just bought a new one and I need to get it replaced. FORD 1994 Taurus SHO 3.2 liter engine YAMAHA


may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
  1. Remove the two idle air control valve retaining bolts.
  1. Remove the idle air control valve and idle air control valve gasket.
Installation
  1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).

    Clean idle air control valve gasket mating surfaces.
  1. To install idle air control valve, reverse Removal procedure.
  1. Tighten the idle air control valve retaining bolts to 8-12 Nm (71-106 lb-in).
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Jan 14, 2010 | 1994 Ford Taurus

1 Answer

1991 chevy extended cab 1500 with a 350 it will idle down low the die then it will idle high run ok for a while always changing


Possible deposit buildup in the throttle body and specifically the IAC (idle air control chambers).This causes disturbance and your systems ability to control air/fuel mixtures at near idle conditions .Perform service, recomending removal of the IAC valve and cleaning with an O2 safe injection cleaner.3M makes a very good line of products including 3M"do it yourself" fuel system tune up pn#8963.Also verify proper EGR operation and no sticky valve or build up there.....good luck

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1 Answer

Timing and idleling issue


well is the idle air control bad? do you have enough coolant? as this vehicle idle is coolant based as well as throttle body positioning sensor.but you may have a nice vacuum leak too when you replaced you head you may have left some gasket material in between the intake manifold or air plenum causing an incorrect sealing/ leak, and also valve timing needs to be checked may need to relap/regap the best bet is to follow your repair manuals troubleshooting section and the process of elimination good luck!

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Rpms going up and down from 1500 to 3500 in park and drive


change your idle air control valve tech term IAC.happy holiday

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Idle too high +goes higher when put in gear (manual transmision


IAC valve problem. Nissan has a updated harness (with one way diode inside of the harness) to prevent backfeeding for the IAC valve and a new IAC valve also gets installed. That's where I would look. IAC valve or "idle air control" valve.

Aug 23, 2008 | 1998 Nissan 200SX

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